[Wrf-users] information

[Jan Ploski]

wrf-users-bounces at ucar.edu schrieb am 12/04/2007 12:06:37 PM:

> 
> Hi,
> 
> I need an information about a server computer. We are going to buy a
> high capacity computer which is going to be $30,000. 
> Could you please inform me what kind of properties do we need for 
> this computer? Like its ram, capacity, speed, processor...

Hi,

As far as I can tell based on our last year's experience, you should go 
for a cluster of 2GHz Opteron dual-core nodes, 8 GB of RAM per node, 
connected with InfiniBand (or InfiniPath, it doesn't really seem to 
matter). Use the MPI variant (MVAPICH) and do not bother with a higher CPU 
count per node and OpenMP. You could probably also live with 4 GB RAM - a 
30km/10km run over Germany takes only 1 GB RAM, for example.

Actually, the poor performance of PGI's OpenMP is puzzling to me:

https://srvgrid01.offis.uni-oldenburg.de/wrf-benchmark/benchmarks.pl

Can the OpenMP results explained or at least qualitatively confirmed by 
anyone?

Regards,
Jan Ploski

--
Dipl.-Inform. (FH) Jan Ploski
OFFIS
Betriebliches Informationsmanagement
Escherweg 2  - 26121 Oldenburg - Germany
Fon: +49 441 9722 - 184 Fax: +49 441 9722 - 202
E-Mail: Jan.Ploski at offis.de - URL: http://www.offis.de